Liquid crystal display device

Abstract

A display device includes a TFT substrate with gate signal lines, drain signal lines, thin-film transistors connected thereto, a gate driver connected to the gate signal lines, a drain driver having output terminals connected to drain signal lines, and a film substrate having first wirings. The first wirings are disposed between the drain driver and the film substrate. The drain driver is mounted on the film substrate, and the output terminals are connected to the first wirings between the film substrate and the drain driver. The output terminal includes first group terminals formed in parallel with a longer edge of the drain driver, and second group terminals formed in parallel with the longer edge and disposed between the loner edge and the first group terminals.

1 . A chip-on-film (COF) type display driver comprising:
 a film substrate comprising a plurality of first wirings which are electrically connected to a plurality of output terminals and a plurality of second wirings which are electrically connected to a plurality of input terminals; and   a semiconductor integrated circuit mounted on the film substrate and comprising a plurality of output bumps and a plurality of input bumps, the plurality of output bumps are connected to the plurality of first wirings and the plurality of input bumps are connected to the second wirings,   wherein the film substrate comprises a first surface and a second surface, and the plurality of first and second wirings and the semiconductor integrated circuit are disposed on the first surface of the film substrate,   wherein the plurality of output bumps comprises a first group which consists of first output bumps and a second group which consists of second output bumps, and the plurality of input bumps and the first and second output bumps are arranged in parallel with a longer edge of the semiconductor integrated circuit, and   wherein the first output bumps are disposed between the second output bumps and the plurality input bumps.   
     
     
         2 . A COF type display driver according to  claim 1 ,
 wherein the semiconductor integrated circuit is configured on a semiconductor chip.   
     
     
         3 . A COF type display driver according to  claim 2 ,
 wherein the first output bumps are disposed at a central portion along a relatively short side direction of the semiconductor chip.   
     
     
         4 . A COF type display driver according to  claim 2 ,
 wherein a part of the first wirings which are connected to the first output bumps are disposed between the semiconductor chip and the film substrate.   
     
     
         5 . A COF type display driver according to  claim 4 ,
 wherein the part of the first wirings which are connected to the first output bumps are disposed between a decoder circuit of the semiconductor integrated circuit and the film substrate.   
     
     
         6 . A COF type display driver according to  claim 4 ,
 wherein the part of the first wirings which are connected to the first output bumps are disposed at a plurality of spaces between the plurality of second bumps.   
     
     
         7 . A COF type display driver according to  claim 2 ,
 wherein the film substrate further comprises a third wiring on the first substrate, and   wherein a first input bump and a second input bump of the plurality of input bumps are connected by the third wiring.   
     
     
         8 . A COF type display driver according to  claim 7 ,
 wherein the third wiring is disposed between the semiconductor chip and the film substrate.   
     
     
         9 . A COF type display driver according to  claim 8 ,
 wherein the third wiring is a power supply wiring.   
     
     
         10 . A COF type display driver according to  claim 8 ,
 wherein the third wiring is a clock supply wiring.